DB CFG Config File

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Database configuration file parameters

Table 1: Descriptions of database configuration file parameters

Parameter Description Value Default

app_ctl_heap_sz Sets the total memory

size allowed for the

application control heap.

0-64,000 4k pages 128

appgroup_mem_sz Sets the total size of the

memory segment shared

by the application group.

1-1,000,000 4k pages 10,000

applheapsz Sets the number of

memory pages that only

the DB2 Database

Manager can use for an

agent.

16-60,000 4k pages 256

autorestart Enables or disables the

DB2 Database Manager

to restarting automatically

when it is in an

inconsistent state.

ON OFF ON

avg_appls Sets the average number

of applications accessing

the database.

1-maxappls 1

backup_pending A read-only parameter

that determines whether

a database should be

backed up.

None None

blk_log_dsk_ful Indicates whether

applications should

freeze if a log full error

occurs.

YES NO NO

buffpage Sets the buffer pool size

for buffer pool

commands executed with

the NPAGES parameter

set to 1.

2-524,288 pages 250

Windows

1000 UNIX

catalogcache_sz Indicates the total

memory needed to

cache system catalog

information.

-1 8-524,288 4k pages -1

chngpgs_thresh Indicates the percentage

of buffer pool pages that

must be altered before

the asynchronous page

cleaners start.

5-99% 60

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codepage A read-only parameter

that identifies the code

page.

None None

codeset A read-only parameter

that identifies the code

set.

None None

collate_info A read-only parameter

that indicates the

database's collating

sequence.

None None

copy_protect Enables or disables copy

protection for the

database.

YES NO NO

country A read-only parameter

that identifies the

database's territory code.

None None

database_consistent A read-only parameter

that indicates whether the

database is in an

inconsistent state.

None None

database_level A read-only parameter

that indicates the DB2

Database Manager

version that's able to use

the database.

None None

database_memory Reserves a minimum

amount of shared

memory used by the

database.

AUTOMATIC

0-1,294,967,295 4K

pages

AUTO-MATIC

dbheap Sets the database heap

size that stores open

cursor control

information.

AUTOMATIC

32-524,288 4K pages

dft_degree Sets the CURRENT

DEGREE special

register and DEGREE

bind option values.

-1 1-32,767 1

dft_extent_sz Sets the extent size used

when table spaces are

created.

2-256 4K pages 32

dft_loadrec_ses Sets the number of load

recovery session used

for a table load operation

recovery.

1-30,000 1

dft_prefetch_sz Indicates the prefetch

size used when table

spaces are created.

0-32,767 4K pages 16

Windows

32 UNIX


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dft_queryopt Indicates the query

optimization class used

by the DB2 Optimizer

when performing SQL

queries.

0-9 5

dft_refresh_age Sets the value of the

refresh age used by

summary tables.

ANY

0-99,999,999,999,999

0

dft_sqlmathwarn Determines whether

arithmetic and retrieval

conversion errors are

errors or warnings.

YES NO NO

dir_obj_name Indicates the name of the

object that represents the

database manager

instance.

A valid string of

characters

NULL

discover_db Determines whether

database information

prompted by a discovery

request is returned to a

client.

ENABLE DISABLE ENABLE

dl_expint Sets the time period in

which a Db2 Data Links

Manager file access

token remains valid.

1-31,536,000 seconds 60

dl_num_copies Indicates the extra

number of copies of a file

- linked to the database

should be made in the

archive server.

0-15 0

dl_time_drop Indicates the time period

for files to remain on the

archive server after the

DROP command is

issued on a table,

database, or table space.

0-365 days 0

dl_token Indicates the algorithm to

use when generating

DATALINK file access

control tokens.

MACO MAC1 MACO

dl_upper Indicates whether file

access control tokens

are able to use

uppercase and

lowercase letters or only

uppercase letters.

YES NO YES

dl_wt_iexpint Indicates the time period

for which a write token is

valid.

1-31,536,000 seconds 60


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dlchktime Sets the frequency for

the Database Manager to

check for application

deadlocks.

1,000-600,000

milliseconds

10,000

dyn_query_mgmt Enables or disables

queries that exceed

thresholds from being

trapped by the DB2

Query Patroller.

ENABLE DISABLE DISABLE

estore_seg_sz Indicates the number of

pages the extended

memory segments of the

database store.

0-1,048,575 4k pages 16,000

groupheap_ratio Indicates the percentage

of memory that's

dedicated to the

application group heap.

1-99% 70

indexrec Indicates when invalid

indexes should be

recreated when the

database is accessed or

when it is restarted.

SYSTEM ACCESS

RESTART

SYSTEM

indexsort Determines whether

index keys are sorted

during index creation.

YES NO YES

locklist Indicates the total

memory allowed for

holding the lock list.

4-60,000 4k pages 25,50

Windows

100 UNIX

locktimeout Indicates the time an

application waits to

receive a lock before

timing out.

-1 0-30,000 -1

log_retain_status A read-only parameter

that indicates whether log

files should be retained

for roll-forward recovery

operations.

None None

logbufsz Sets the total memory

assigned to buffer log

records before being

written to disk.

4-4096 4k pages 8

logfilsiz Indicates the disk

storage space allowed

for log files used for data

recovery.

4-262,144 4K pages 250

Windows

1,000 UNIX

loghead A read-only parameter

that indicates the log file

None None


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name of the last recorded

log file located at the

head of the active log.

logpath A read-only parameter

that indicates the path

used to access log files.

None None

logprimary Indicates how many

primary log files will be

used for transaction

logging.

2-256 3

logretain Indicates whether to

retain active log files as

archived log files for

recovery operations.

RECOVERY NO NO

logsecond Indicates how many

secondary log files will

be used for transaction

logging.

-1 0-254 2

max_log Indicates the maximum

amount of active log

space a transaction uses.

0s-100% 0

maxappls Indicates the total

number of applications

that can connect to the

database at one time.

AUTOMATIC 1-60,000 AUTO-MATIC

maxfilop Sets the total number of

database files that can be

opened simultaneously

by an application.

2-32,768 Windows

2-1,950 UNIX

64

maxlocks Indicates the percentage

of the lock list an

application can use.

1-100 22

Windows

10 UNIX

min_dec_div_3 Determines whether

decimal division

arithmetic operations

have a scale of 3.

YES NO NO

mincommit Indicates how many

COMMIT SQL

statements should be

processed before writing

log records to disk.

1-25 1

mirrorlogpath Indicates the storage

location of the second

copies of the primary and

secondary log files.

A valid string of

characters

NULL


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multipage_alloc A read-only parameter


SMS tablespace storage

space is allocated one

page or one extent at a

time.

None None

newlogpath Indicates the new

storage location of the

primary and secondary

log files.

A valid string of

characters.

NULL

num_db_backups Indicates how many

database backup images

should be retained for a

database.

1-32,768 12

num_estore_segs Indicates how many

extended storage

memory segments are

available to the database.

0-2,147,483,647 0

num_freqvalues Sets the number of most

frequent values to be

collected when the

RUNSTATS command is

executed with the WITH

DISTRIBUTION option.

0-32,767 10

num_iocleaners Indicates the number of

asynchronous page

cleaners the database

uses.

0-255 1

num_ioservers Indicates how many I/O

servers the database

uses.

1-255 3

num_log_span Determines how many

active log files an active

transaction can span.

0-65,535 0

num_quantities Sets the number of

quantities to be collected

when the RUNSTATS

command is executed

with the WITH

DISTRIBUTION option.

0-32,767 20

numsegs A read-only parameter

that indicates the number

of containers created

within the SMS

tablespaces.

None None

overflowlogpath Indicates the storage

location of active log files

required to rollback

A valid string of

characters

NULL


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operations.

pckcachesz Sets the amount of

application memory used

to cache packages.

-1 32-64,000 4k pages -1

rec_his_retentn Indicates how many days

to retain historical

information on backups.

-1 0-30,000 days 366

release A read-only parameter

that indicates the version

of the database

configuration file.

None None

restore_pending A read-only parameter


database is in a state of

Restore Pending.

None None

rollfwd_pending A read-only parameter


database requires a

roll-forward recovery

procedure.

None None

seqdetect Enables or disables

sequential detection for

the database.

YES NO YES

sheapthres_shr Sets the total amount of

memory used at one time

to perform sort

operations.

250-2,097,152 4k

pages

Sortheap

softmax Sets the total amount of

log file space percentage

that is consumed before

soft checkpoint is taken.

1-100 logprimary 100

sortheap Sets the total amount of

memory available for sort

operations.

16-524,288 4kpages 256

stat_heap_sz Sets the total heap space

size used for creating

and collecting table

statistics.

1,096-524,288

4kpages

4384

stmtheap Sets the heap size used

when compiling SQL

statements.

128-65,535 4kpages 2048

territory A read-only parameter

that indicates the

database territory.

None None

trackmod Indicates whether

tracking is enabled for

database modifications

YES NO NO


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made when an

incremental backup is

performed.

tsm_mgmtclass Determines how the

server manages object

backup versions.

A valid string of

characters.

NULL

tsm_nodename Indicates the TSM

product node name.

A valid string of

characters.

NULL

tsm_owner Indicates the TSM

product owner.

A valid string of

characters.

NULL

tsm_password Sets the TSM product's

password.

A valid string of

characters.

NULL

userexit Indicates whether a user

exit program is to be

called for roll-forward

recovery operations.

YES NO NO

user_exit_status A read-only parameter


to store archive log files

with a user exit function.

None None

util_heap_sz Indicates the total amount

of shared memory that

the backup, restore, and

load utilities can use

simultaneously.

16-524,288 4Kpages 5000

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DB CFG Config File

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